CCD observations of the RR Lyrae stars in NGC 2210 and the distance to the Large Magellanic Cloud

Astronomy and Astrophysics – Astronomy

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Astronomical Photometry, Blue Stars, Cepheid Variables, Giant Stars, Globular Clusters, Magellanic Clouds, Charge Coupled Devices, Distance, Hertzsprung-Russell Diagram, Light Curve, Stellar Spectrophotometry

Scientific paper

CCD photometry of 9 RR Lyrae stars in the LMC globular cluster NGC 2210 suggests that the true distance modulus of the LMC is 18.42±0.10 mag, assuming RR = 0.60 and E(B-V) = 0.060 for NGC 2210. The implications of this result on the Cepheid distance scale are discussed. The results demonstrate that high-accuracy photometry on stars as faint as 20 mag is possible with a combination consisting of a CCD camera and a 1-m telescope.

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